First published in 2002. Routledge is an imprint of Taylor & Francis, an informa company.

Part I The Philosophy of Language; Chapter I Language and Reality: The Theme of a Philosophy of Language; Chapter II What is Language? Origin and Development the Science of Language; Chapter III Language as the Bearer of Meaning: What it is to Understand; Chapter IV The Phenomenology of Linguistic Meaning: The Primary Functions of Language; Chapter V The Normative Problem of Language: Linguistic Validity; Chapter VI Intelligible Communication: Its Nature and Conditions; Chapter VII Language and Logic: the "Logical Analysis" of Language; Chapter VIII Language and Cognition: The Metalogical Problems of Language; Part II The Principles of Symbolism; Chapter IX The Principles of Symbolism: The General Theory of Symbolism; Chapter X The Language of Poetry and its Symbolic Form; Chapter XI Science and Symbolism: Symbolism as a Scientific Principle; Chapter XII Religious Symbols and the Problem of Religious Knowledge; Chapter XIII The Language of Metaphysics: Symbolism as a Metaphysical Principle; Chapter XIV Philosophia Perennis: The "Natural Metaphysic of the Human Mind";